Draw-bar balance for vehicles



F. MULLER.

DRAW BAR BALANCE FOR VEHICLES.

APPLICATION FILED SEPT. 10, 1918.

1 ,333 ,9321 Patented Twiar. 16, 1920,

UNITED strains ratrnnronmon.

FRITZ Mfi'LLER, OF BlillRN'IEl SWITZERLAND, ASSIGNOR OF ONE-HALF '10 ALOIS LEUTENEGGEB, GE OLTEN, S-ET'IITZERLAND.'

DRAW-BAR- BALANCE FOR VEHICLES.

Application filed September 10, 1918.

To all whom it may concern.

Be it known that I, F nrrz Mtmnnn, a citizen of the Swiss Confederation, and residing at Berne, Switzerland, have invented certain new and useful Improved Draw-Bar Balances for Vehicles, of which the following is a specification.

My invention relates to a novel (1 aw barhalances for vehicles. it possesses two angle-levers, which on their one end are held together and in the direction of the shaft are reinovably guided. These angle-levers are joined on their elbows to draw-bars which cross each other and are fastened on the other end to the shaft.

This permits a nearly symmetrical movement of the levers. In case of an unequal pull of the horses, the weaker one will not be drawn back, as it is the case with ordinary draw-bar balances in use, but the new device will in an elastic manner permit the weaker horse to hold step with the strongerhorse.

This contributes materially to an easy start of the vehicle as the horses are bound to work better together, which avoids an overworking of the horses as well as a loss of energy.

The invention consists of novel features and parts and combinations of the same, which will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawing, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 isa top-view of the drawharbalance,

Fig. 2 a section taken at the line 11-11 on Fig. l; and Fig. 3 a sectional view on line 111-411 of Fig. 1.

The two draw-bars 1 are connected by means of hooks and rings to the free ends of the angle-levers 2, whose other ends are connected together by means of a bolt 3. The lower end of this bolt is engaged in a guide slot 4 on the shaft 10 of a vehicle not shown and can move to and fro in the longitudinal axis of the shaft.

A pair of crossed tension rods 6 are attached on the elbows of the angle-levers 2 and likewise a spiral spring 12 which draws Specification of Letters Patent.

Patented Mar. 16, 1920.

Serial No. 253,466.

together the two elbows of the angle levers. The other ends of the tension. rods are connected by means of bolts? to the ends of a lever 8, whose turning bolt 9 is fastened on the shaft 10.

The pull on the draw bars 1 in the direction of the arrows is transferred on the shaft by means of the system of joints of the parts 2, 6 and 8.

The angle-levers 2 turn around fulcrums 5, which on account of the disposition of the tension rods 6, in opposition to the spiral spring force 12, move outward and permit the bolt 3 to slide backward in the guide slot The ends of the angle-levers 2 which hold the draw-bars move forward for the same distance, in case the tractive effort on both ends practically the same. In the other event, the distance will not be the same, because the crossing tension rods and the lever 8 will permit the turning point 5 on the elhow of the one angle lever 2, on which the greater pull is exerted, to make a greater sideward movement. This'allows a certain balance between both tractive efforts, through which an equal starting pull of the two horses is gained. The forward rocking movement of the angle levers 2 is. limited by noses 11 provided on their joined ends.

What I claim is:

1. A draw-bar balance for vehicles comprising in combination with the shaft of the vehicle two angle-levers forming drawbars and joined at their one ends, means for guiding these ends in the longitudinal axis of the shaft, and mutually crossing tension rods pivotally connected to the elbows of said levers and pivoted to the shaft with their other ends. l

2. A. draw-bar balance as specified in claim 1, inwhich a two-armed lever is provided fulcrumed on the shaft, the free ends of the tension rods being connected to the arms of said lever.

3. A draw-bar balance as specified in claim 1, in which the two angle levers are joined by a bolt engaging in a guide slot provided on the shaft in its longitudinal axls.

i. A draw-bar balance as specified in claim 1, in which the joined ends of the angle-levers are formed with noses for limiting the forward rocking movement of the levers.

5. In a draw-bar balance as specified in claim 1, a spring connectin the angle levers at their elbows resisting the forward rocking movement of the free ends of said levers.

FRITZ MULLER.

Witnesses:

HANS RINDERKNEOHT, FRIEDRICH MANING. 

